Baseball bat pen



FIG. 1 is a perspective view of a baseball bat pen showing my new design in its closed configuration;

FIG. 2 is a top view thereof;

FIG. 3 is a left end view thereof;

FIG. 4 is a right end view thereof; and,

FIG. 5 is a perspective view of a baseball bat pen showing my new design in its open configuration. 

The ornamental design for a baseball bat pen, as shown and described. 